Go to the Control Panel
Click on Network and Internet
Click on Network and Sharing Center
Go to Change Adapter Settings.
You’ll see some network icons here. Select the network you’re currently connected to and right click on it. Select Properties.
Double click on IPv4 and to open it’s Properties.
If “Obtain DNS server address automatically” is selected, click the radio button next to “Use the following DNS server addresses:”
Now enter your SmartDNS IP address that you received in your account data as Preferred DNS server.
Click on Ok and Close.
Click “Start” and type the word “cmd”. You will see black icon of cmd.exe program. Click it.
In the open prompt, type “ipconfig /flushdns” (without the quotes). You should receive a message of your success as confirmation when the cache is cleared.